The difference in price is about $15, last I checked and this is actually less expensive, mainly because of the low cost of registered ECC memory, but the upgraded system board and processor in this list will allow the NAS to accommodate a massive amount of memory. This is what I am using, with 64GB of RAM, for my main NAS at the time of writing this. (March 3, 2019) and it does everything I want

You can buy newer hardware, but the gains between the hardware revision listed and the next generation after it are minor, while the cost increases significantly. If you go a generation newer than that, the cost becomes so significant that most home-game users will be deterred by it.